Potable Water Expansion Tank Leaking

It may be leaking from the threads in the tank since the tank is wet on the outside.

Potable water expansion tank leaking.

These potable water expansion tanks feature a 100 butyl diaphragm and plastic liner to separate the system water from the tanks air precharge. If the tank is on the hot water heating system then it s there to relieve expansion from the water being heated. I can t tell from the photo if it s on the heating system or on the home water supply. Remove the intake pipe from the boiler to the circulator.

The life expectancy of expansion tanks is very. For example a 50 gallon water heater can be supplied by a 2 gallon expansion tank. Unequal water to air ratios caused by a built in barrier failure pressure valve leakage or low air pressure in the expansion tank cause problems with the system s efficiency so troubleshooting may. Attach a hose to the outlet valve and drain any water out of the expansion tank.

When this happens excess water is immediately sent to the expansion tank to lower pressure levels inside the water heater. When water is heated or the hot water is shut off quickly the tanks filled with both air and water will equalize the resulting water pressure. This is called thermal expansion. But sometimes due to wear and tear your expansion tank may start leaking.

Then re tighten the threads using teflon tape and thread sealant on the threads. When water in a tank water heater is heated the molecules speed up and as they do they require more space. Inspect the expansion tank to determine where the leak is located. And the tanks are finished with appliance quality paint to help prevent external corrosion.

The system has a stainless steel sleeve to prevent corrosion something no other manufacturer offers. The reason you need an expansion tank is because of thermal expansion. A 40 gallon water heater can create an extra gallon of volume when it is fully heated. If the leak comes from the pipe fiting seen at the top of the tank.

If you have several heaters in the same system or connected you can equip each heater with an expansion tank or you can use a single larger expansion tank. You can also drain the water into a bucket if you don t have a hose available. Try shutting off the water and unthreading the tank. Turn off the valve that feeds water from the boiler to the expansion tank.

What is the life expectancy of expansion tanks. Can i fix a leak in my watts potable water expansion tank myself or do i need to call in a professional. A hot water expansion tank is a small metal tank usually 2 5 gallons that s installed just downstream of the cold water inlet valve that feeds your residential water heater.